2Ibach MB, Grier JF, Goldman DE, et al, Diagnostic considerations in evaluation of patients presenting with melena and nondiagnostic esophagogastroduodenoscopy. Dig Dis Sci, 1995,40:1459-62.
3Davies GR, Benson M J, Gertner DJ, et al. Diagnostic and therapeutic push-type enteroscopy in clinical use. Gut,1995,37:346-52.
4Barkin JS, Chong J, Reiner DK. First generation video enteroseope: fourth generation push-type small bowel enteroscopy utilizing an overtube. Gastrointest Endose,1994,40:743.
5Morris AJ. Wasson LA, MacKenzie ,JF, Small bowel enteroscopy in undiagnosed gastrointestinal blood loss. Gut.1992,33:887-9
